Resolve "Add links to group/person detail pages in Core"

Closes #313 (closed)

aleksis/apps/alsijil/frontend/components/injectables/group_actions/OpenCoursebook.vue

+<script>
+import groupActionsMixin from "aleksis.core/components/group/actions/groupActionsMixin.js";
+export default {
+  name: "OpenCoursebook",
+  mixins: [groupActionsMixin],
+};
+</script>
+
+<template>
+  <v-list-item
+    :to="{
+      name: 'alsijil.coursebook',
+      params: {
+        filterType: 'all',
+        pageType: 'documentations',
+        objType: 'group',
+        objId: group.id,
+      },
+    }"
+  >
+    <v-list-item-icon>
+      <v-icon>mdi-book-education-outline</v-icon>
+    </v-list-item-icon>
+    <v-list-item-content>
+      <v-list-item-title>
+        {{ $t("actions.open_in_coursebook") }}
+      </v-list-item-title>
+    </v-list-item-content>
+  </v-list-item>
+</template>